<template>
  <div class="component-upload-image">
    <el-upload
      multiple
      action=""
      :http-request="uploadHandler"
      list-type="picture-card"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      ref="imageUpload"
      :on-remove="handleDelete"
      :show-file-list="true"
      :headers="headers"
      :file-list="fileList"
      :on-preview="handlePictureCardPreview"
      :class="{hide: this.fileList.length >= this.limit}"
    >
      <i class="el-icon-plus"></i>
    </el-upload>

    <!-- 上传提示 -->
    <div class="el-upload__tip" slot="tip" v-if="showTip">
      请上传
      <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
      <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
      <template v-if="fileRatio"> 比例为 <b style="color: #f56c6c">{{ fileRatio }}</b> </template>
      <template v-if="limit"> 照片为 <b style="color: #f56c6c">{{ limit }}张</b> </template>
      的文件
    </div>

    <el-dialog
      :visible.sync="dialogVisible"
      title="预览"
      width="800"
      append-to-body
    >
      <video  style="display: block; max-width: 100%; margin: 0 auto" autoplay v-if="dialogImageUrl.endsWith('.mp4')">
        <source :src="dialogImageUrl" type="video/mp4">
      </video>
      <el-card class="box-card" v-else-if="isFile(dialogImageUrl)">

        <div   class="text item">
          <a :href="dialogImageUrl">{{getFileName(dialogImageUrl)}}</a>
        </div>
      </el-card>
      <img
        :src="dialogImageUrl"
        style="display: block; max-width: 100%; margin: 0 auto"
        v-else
      />
    </el-dialog>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";
import { cosUpload, ossUpload } from "@/utils/ossUpload";
import doc from "@/components/RuoYi/Doc";
import {currentOss} from "@/api/tool/ossSTS";

export default {
  props: {
    value: [String, Object, Array],
    // 图片数量限制
    limit: {
      type: Number,
      default: 10,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 10,
    },
    // 大小比例
    fileRatio: {
      type: String,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg'] ['png','jpg','jpeg','mp4','pdf','doc','docx','xls','xlsx'],
    fileType: {
      type: Array,
      default: () => ['png','jpg','jpeg','mp4','pdf','doc','docx','xls','xlsx'],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true
    },
  },
  data() {
    return {
      number: 0,
      uploadList: [],
      fileTypeList :['doc','docx','xls','xlsx','ppt','pdf'],
      videoList :['mp4',"mov","avi"],
      imgList :['jpg','png','jpeg'],
      dialogImageUrl: "",
      dialogVisible: false,
      hideUpload: false,
      baseUrl: process.env.VUE_APP_BASE_API,
      uploadImgUrl: process.env.VUE_APP_BASE_API + "/common/upload", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      fileList: [],
      currentOss: {},
    };
  },
  watch: {
    value: {
      handler(val) {
        if (val) {
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(',');
          // 然后将数组转为对象数组
          this.fileList = list.map(item => {
            if (typeof item === "string") {
              if (item.indexOf("http:") === -1 && item.indexOf("https:") === -1){
                item = { name: this.baseUrl + item, url: this.baseUrl + item };
              } else {
                item = { name: item, url: item };
              }
            }
            return item;
          });
        } else {
          this.fileList = [];
          return [];
        }
        this.watchFileUpdate()
      },
      deep: true,
      immediate: true
    }
  },
  created(){
    this.getCurrentOss();
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
  },
  methods: {

    // -----------------------------
    getCurrentOss(){
      currentOss().then(res => {
        this.currentOss = res.data;
      });
    },
    uploadHandler(file){
      const type = this.currentOss.currentType;
      if(type == '0'){
        this.uploadOSS(file);
      }else if(type == '1'){
        this.uploadCOS(file);
      }else if(type == '2'){
        this.uploadLocal(file);
      }else {
        console.log("请检查对象存储配置");
      }
    },
    uploadOSS(file){
      ossUpload(file.file, file.file.name, taskRes => {
        // taskRes 这个回调返回的值就是我们在cos.js里面传的 cos实例 和 taskId
        // this.currTask = taskRes
      }).then(res => {
        let url = `https://${res.Location}`;
        this.uploadList.push({ name: file.file.name, url: url });
      }).catch(err=>{
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(err);
        this.$refs.imageUpload.handleRemove(file);
      }).finally(() => {
        this.uploadedSuccessfully();
      })
    },
    uploadCOS(file){
      // var fileNames = file.file.name;
      cosUpload(file.file, file.file.name, taskRes => {
        // taskRes 这个回调返回的值就是我们在cos.js里面传的 cos实例 和 taskId
        // this.currTask = taskRes
      }).then(res => {
        // let Location = res.Location.split("/");
        // Location[Location.length - 1] = fileNames
        // const str = Location.join("/");
        let url = `https://`+decodeURIComponent(res.Location);
        this.uploadList.push({ name: file.file.name, url: url });
      }).catch(err=>{
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(err);
        this.$refs.imageUpload.handleRemove(file);
      }).finally(() => {
        this.uploadedSuccessfully();
      })
    },
    uploadLocal(file){

    },

    //-------------------------------



    getFileName(url){
      let splie = url.split('/');
      return splie[splie.length -1];
    },
    isFile(url){
      let splie = url.split('.');
      return this.fileTypeList.includes(splie[splie.length -1]);
    },
    watchFileUpdate(){
      // image节点转Video节点
      function  imageToVideo(imageNode){
        let parent = imageNode.parentElement
        let rect = imageNode.getBoundingClientRect();
        let videoElement = document.createElement("video");
        videoElement.src = imageNode.src;
        videoElement.width = rect.width;
        videoElement.height = rect.height;
        videoElement.className = "el-upload-list__item-thumbnail";
        parent.insertBefore(videoElement,imageNode);
        parent.removeChild(imageNode);
      }
      function  drawCaves(text,rect){
        let element = document.createElement("canvas");
        element.width = rect.width;
        element.height = rect.height;
        let ctx = element.getContext('2d');
        let gradient = ctx.createLinearGradient(0, 0, element.width, 0);
        gradient.addColorStop("0", "magenta");
        gradient.addColorStop("0.5", "blue");
        gradient.addColorStop("1.0", "red");
        ctx.fillStyle = gradient;
        ctx.font = 'bold 40px 微软雅黑';
        ctx.textAlign = 'center';
        ctx.fillText(text, element.width /2 , element.height / 2 + 40/2);
        return element;
      }
      function imageToFile(imageNode){
        let parent = imageNode.parentElement;
        let rect = imageNode.getBoundingClientRect();
        let splie = imageNode.src.split('.');
        let videoElement = drawCaves(splie[splie.length - 1].toUpperCase(),rect);
        videoElement.className = "el-upload-list__item-thumbnail";
        parent.insertBefore(videoElement,imageNode);
        parent.removeChild(imageNode);
      }
      this.$nextTick(()=>{
        setTimeout(()=>{
          let itemList = document.querySelectorAll(".el-upload-list__item-thumbnail")
          for(let item of itemList){
            let splie = item.src.split('.')
            let endsWith = splie[splie.length - 1]
            switch (endsWith.toLocaleString()){
              case 'mp4':
                imageToVideo(item)
                break
              case 'pdf':
              case 'doc':
              case 'docx':
              case 'xls':
              case 'xlsx':
                imageToFile(item)
                break
            }
          }

        },200)
      })
    },

    // 上传前loading加载
    handleBeforeUpload(file) {
      let isImg = false;
      if (this.fileType.length) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        isImg = this.fileType.some(type => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
      } else {
        isImg = file.type.indexOf("image") > -1;
      }

      if (!isImg) {
        this.$modal.msgError(`文件格式不正确, 请上传${this.fileType.join("/")}图片格式文件!`);
        return false;
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`上传头像图片大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.$modal.loading("正在上传图片，请稍候...");
      this.number++;
    },
    // 文件个数超出
    handleExceed() {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
      if (res.code === 200) {
        this.uploadList.push({ name: res.fileName, url: res.url });
        this.uploadedSuccessfully();
      } else {
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(res.msg);
        this.$refs.imageUpload.handleRemove(file);
        this.uploadedSuccessfully();
      }
    },
    // 删除图片
    handleDelete(file) {
      const findex = this.fileList.map(f => f.name).indexOf(file.name);
      if (findex > -1) {
        this.fileList.splice(findex, 1);
        this.$emit("input", this.listToString(this.fileList));
      }
      this.watchFileUpdate()
    },
    // 上传失败
    handleUploadError() {
      this.$modal.msgError("上传图片失败，请重试");
      this.$modal.closeLoading();
    },
    // 上传结束处理
    uploadedSuccessfully() {
      if (this.number > 0 && this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        this.$emit("input", this.listToString(this.fileList));
        this.$modal.closeLoading();
      }

      this.watchFileUpdate();
    },

    // 预览
    handlePictureCardPreview(file) {
      this.dialogImageUrl = decodeURIComponent(file.url);
      this.dialogVisible = true;
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        if (list[i].url) {
          strs += list[i].url.replace(this.baseUrl, "") + separator;
        }
      }
      return strs != '' ? strs.substr(0, strs.length - 1) : '';
    }
  }
};
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
  display: none;
}
// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
  transition: all 0s;
}

::v-deep .el-list-enter, .el-list-leave-active {
  opacity: 0;
  transform: translateY(0);
}
</style>

